Gillian is a humpback whale living in the Cetacean Ops section of the USS Voyager-A who helps translate Murf's mysterious message.
Gillian is a humpback whale who lives in Cetacean Ops aboard the USS Voyager-A, where Rok-Tahk is assigned during her cadet training. Rok befriends the whale while working there.
In Observer's Paradox, the friends cannot understand Murf's babbling after he paints a mural matching Gwyn's visions. Gillian persuades a reluctant Rok to help, and when Murf dives into the water and sprouts a tail and fins, Gillian translates his words as a plea to find someone, along with a set of coordinates.